physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Blood Blister in Mouth Cheek. Blood blister can develop anywhere in our mouth and not just in the cheek region. They can also appear on the tongue and gums and cause extreme pain while brushing. Spotting a blood blister in mouth cheek is very easy as their morphology is quite similar to pimples.